import java.util.Scanner;

/**
 * @Author liangzai
 * @Description:
 */
public class Test {
        public boolean isPalindrome(String s) {
            s = s.toLowerCase();
            int left = 0;
            int right = s.length()-1;
            while (left < right) {
                while (left < right && !isNumberAndCharacter(s.charAt(left))) {
                    left++;
                }
                while(left < right && !isNumberAndCharacter(s.charAt(right))) {
                    right--;
                }
                if(s.charAt(left) == s.charAt(right)) {
                    left++;
                    right--;
                }else {
                    return false;
                }
            }
            return true;
        }
        private boolean isNumberAndCharacter(char ch) {
            if(Character.isDigit(ch) || Character.isLetter(ch)) {
                return true;
            }
            return false;
        }

        public int firstUniqChar(String s) {
            int[] count = new int[26];
            for (int i = 0; i < s.length(); i++) {
                char ch = s.charAt(i);
                count[ch - 'a'] ++;
            }
            for (int i = 0; i < s.length(); i++) {
                char ch = s.charAt(i);
                if(count[ch - 'a'] == 1) {
                    return i;
                }
            }
            return -1;
        }


        public static void main(String[] args) {
            Scanner scan = new Scanner(System.in);
            String str = scan.nextLine();

            //1. 字符串的分割    split()

            // String[] ss = str.split(" ");
            // int len = ss[ss.length-1].length();

            // System.out.println(len);

            //2. 找到最后一个空格的下标 ，然后截取空格后的字符串，然后求长度  lastindexOf  subString()
            int index = str.lastIndexOf(" ");
            int len = str.substring(index+1).length();
            System.out.println(len);
        }


        public static void main19(String[] args) {
            StringBuilder stringBuilder = new StringBuilder("abcdef");
            stringBuilder.insert(3,"haha");
            //stringBuilder.reverse();
            System.out.println(stringBuilder);
        }

        public static void main18(String[] args) {


            long start = System.currentTimeMillis();//毫秒
            String s = "";
            for(int i = 0; i < 10000; ++i){
                s += i;
            }
            long end = System.currentTimeMillis();
            System.out.println(end - start);


            start = System.currentTimeMillis();
            StringBuffer sbf = new StringBuffer("");
            for(int i = 0; i < 10000; ++i){
                sbf.append(i);
            }
            end = System.currentTimeMillis();
            System.out.println(end - start);


            start = System.currentTimeMillis();
            StringBuilder sbd = new StringBuilder();
            for(int i = 0; i < 10000; ++i){
                sbd.append(i);
            }
            end = System.currentTimeMillis();
            System.out.println(end - start);

        }
        public static void main16(String[] args) {
            String s = "hello";
            s += " world";//s = s + ....
            System.out.println(s);
        }

        public static void main17(String[] args) {
            StringBuilder stringBuilder = new StringBuilder();
            stringBuilder.append("hello");
            stringBuilder.append(" world");
            String ret = stringBuilder.toString();
            System.out.println(ret);
        }

        public static void main15(String[] args) {
            String s = "abcd";

            final char[] array = {'a','b','c'};
            array[0] = 'g';

            // array = new char[10];


        }
        public static void main14(String[] args) {
            String s = "  abc d e f g    ";
            System.out.println(s);

            String s2 = s.trim();//只会去除  左右两边的空格
            System.out.println(s2);

        }


        public static void main13(String[] args) {
            String s = "abcdef";
            String s2 = s.substring(2,4);//[)
            System.out.println(s2);
        }

        public static void main12(String[] args) {
            String s = "name=zhangsan&age=10";
            //返回值  是数组
            String[] strings = s.split("=|&");
            for (int i = 0; i < strings.length; i++) {
                System.out.println(strings[i]);
            }
        }

        public static void main11(String[] args) {
            String s = "ab\\cd\\ef";
            //System.out.println(s);

            String[] strings = s.split("\\\\");
            for (int i = 0; i < strings.length; i++) {
                System.out.println(strings[i]);
            }
        }

        public static void main10(String[] args) {
            String s = "192.168.0.1";
            String[] strings = s.split("\\.");
            for (int i = 0; i < strings.length; i++) {
                System.out.println(strings[i]);
            }
        }

        public static void main9(String[] args) {
            //"name=zhangsan&age=10"
            String s = "name=zhangsan&age=10";
            //返回值  是数组
            String[] strings = s.split("&");
            for (int i = 0; i < strings.length; i++) {
                //strings[i] = name=zhangsan
                //strings[i] = age=10
                //System.out.println(strings[i]);
                String[] ss = strings[i].split("=");
                for (int j = 0; j < ss.length; j++) {
                    System.out.print(ss[j]+" ");
                }
                System.out.println();
            }
        }

        public static void main8(String[] args) {
            String s = "ababcabcd";
            String tmp = s.replace('a','k');
            System.out.println(tmp);

            tmp = s.replace("ab","uuu");
            System.out.println(tmp);

            tmp = s.replaceFirst("ab","ooo");
            System.out.println(tmp);

            tmp = s.replaceAll("ab","ooo");
            System.out.println(tmp);
        }

        public static void main7(String[] args) {
            String s = "hello";
            char[] array = s.toCharArray();
            for (int i = 0; i < array.length; i++) {
                System.out.println(array[i]);
            }

            String s2 = String.format("%d,%d,%d", 2019, 9,14);
            System.out.println(s2);


        }

        public static void main6(String[] args) {
            String s = "hello";
            String s2 = s.toUpperCase();
            System.out.println(s2);


            String s3 = "Hel汉字lo9";
            System.out.println(s3.toLowerCase());
        }

        public static void main5(String[] args) {
            String s1 = String.valueOf(1234);
            String s2 = String.valueOf(12.34);
            String s3 = String.valueOf(true);
            System.out.println(s1);
            System.out.println(s2);
            System.out.println(s3);

        /*String s4 = String.valueOf(new Student("gaobo",13));
        System.out.println(s4);*/


            int data1 = Integer.parseInt("1234");
            double data2 = Double.parseDouble("12.34");
            System.out.println(data1+1);
            System.out.println(data2);
        }

        public static void main4(String[] args) {
            String s = "ababcabcd";
            //倒着往回的 第一个ab
            int index = s.lastIndexOf("abc",4);
            System.out.println(index);

       /* int index = s.indexOf('l');//默认是从0位置开始找
        System.out.println(index);


        index = s.indexOf('l',3);
        System.out.println(index);

        index = s.indexOf("ll",3);//默认是从0位置开始找
        System.out.println(index);
*/

        /*for (int i = 0; i < s.length(); i++) {
            char ch = s.charAt(i);
            System.out.println(ch);
        }*/


        /*char ch = s.charAt(5);
        System.out.println(ch);*/
        /*int[] array = {1,2,3,4,5};
        System.out.println(array.length);*/
        }

        public static void main3(String[] args) {
            String s1 = new String("aeF");
            String s2 = new String("aef");
            //比较字符串的大小
            System.out.println(s1.compareTo(s2));//s1和s2进行比较
            //1. 根据对应字符比较
            //2. 对应字符 无法比较出来 谁大 谁小 此时 就看长度
            System.out.println(s1.compareToIgnoreCase(s2));
        }

        public static void main2(String[] args) {

            String s1 = new String("hello");
            String s2 = new String("hello");
            String s3 = s1;
            System.out.println("=============");
            System.out.println(s1 == s2);//false
            System.out.println(s1 == s3);//true
            System.out.println(s2 == s3);//false
            System.out.println("========================");
            System.out.println(s1.equals(s2));//true
            System.out.println(s1.equals(s3));//true
            System.out.println(s2.equals(s3));//true
        }




        public static void main1(String[] args) {
            String str = "hello";
            String str2 = new String("world");
            char[] value = {'a','b','c'};
            String str3 = new String(value);


            System.out.println(str);
            System.out.println(str2);
            System.out.println(str3);
        }
}
